Stream biofilm bacteria, despite forming the foundation of fluvial microbial ecosystems, have rarely been studied beyond their taxonomic composition

The gap

Evidence profile

Sourced from the discussion and abstract and stated research gap and stated challenges of the source papers, classified as general, drawn from work published between 2019 and 2026, spanning 6 journals. Those papers have been cited 105 times in total.

Supporting evidence — 8 representative gaps

• Mechanisms Driving Seasonal Succession and Community Assembly in Sediment Microbial Communities Across the Dali River Basin, the Loess Plateau, China (2025) · Microorganisms · cited 6× · doi

  Seasonal Dynamics Affect Sediment Microbial Community Diversity In recent years, a great deal of research has been carried out on microbial community diversity from the source area, main stream, estuary, and reservoir areas of the Yellow River in sediments [33–36], but there have been few reports on the sediment microbial com- munities in tributaries.

  generaldiscussion
  Keywords: microbial sediment community diversity seasonal dynamics affect recent years great deal carried source area main
• Microbial Networks in Subsurface Sediment Porewater: Key Drivers for Organic Matter Degradation and Groundwater Chemistry Evolution (2025) · ACS ES&T Water · cited 5× · doi

  These findings emphasize the critical role of porewater microbiomes in organic matter degradation and groundwater environment evolution, calling for further studies on this essential sediment–groundwater interface across diverse aquatic ecosystems.

  generalabstract
  Keywords: groundwater emphasize critical role porewater microbiomes organic matter degradation environment evolution calling further essential sediment
• A functional microbiome catalogue crowdsourced from North American rivers (2024) · Nature · cited 48× · doi

  The lack of genome-resolved functional insights and sampling across multiple rivers hinders the understanding of the core microbial processes governing river biogeochemistry. Previous studies have used taxonomy alone to analyze river microbiomes.

  generalstated research gapevidence 5/5
  Keywords: lack genome-resolved functional insights sampling across multiple rivers
• Variations of bacterial communities induced by Ceratophyllum demersum litter decomposition at the litter sediment interface and in bottom sediments (2026) · World Journal of Microbiology and Biotechnology · doi

  The effects of plant litter decomposition on sedimentary bacterial communities are not well understood. Prior studies have reported the importance of submerged macrophytes in freshwater ecosystems, but the dynamics of bacterial communities during litter decomposition are unclear.

  generalstated research gapevidence 5/5
  Keywords: effects plant litter decomposition sedimentary bacterial communities well
• Biotic Interaction Underpins the Assembly Processes of the Bacterial Community Across the Sediment–Water Interface in a Subalpine Lake (2024) · Microorganisms · cited 6× · doi

  The assembly mechanisms and distribution characteristics of microbial communities at the sediment-water interface are not well understood. The relative roles of deterministic and stochastic processes in the assembly of microbial communities are unclear. The impact of biotic interactions on bacterial community assembly is not well studied.

  generalstated research gapevidence 5/5
  Keywords: assembly mechanisms distribution characteristics microbial communities sediment-water interface
• Limited Microbial Contribution in Salt Lake Sediment and Water to Each Other’s Microbial Communities (2024) · Microorganisms · cited 10× · doi

  Frequent disturbances between sediments and overlying water columns due to climate change and human activities. Significant differences in physical and chemical properties between sediments and aquatic habitats. Limited understanding of the ability of exchanged microorganisms to survive in these two contrasting environments.

  generalstated challengesevidence 5/5
  Keywords: frequent disturbances between sediments overlying water columns due
• Functional and ecological drivers of bacterial interactions in glacier-fed stream biofilms (2026) · mSystems · cited 2× · doi

  However, stream biofilm bacteria, despite forming the foundation of fluvial microbial ecosystems, have rarely been studied beyond their taxonomic composition, although deciphering their interactions is key to understanding ecosystem functioning.

  generalabstractevidence 4/5
  Keywords: stream biofilm bacteria despite forming foundation fluvial microbial ecosystems rarely studied beyond taxonomic composition deciphering
• Exploring co-occurrence patterns between organic micropollutants and bacterial community structure in a mixed-use watershed (2019) · Environmental Science Processes & Impacts · cited 28× · doi

  Complex mixtures of low concentrations of organic micropollutants are commonly found in rivers and streams, but their relationship to the structure of native bacterial communities that underlie critical ecological goods and services in these systems is poorly understood.

  generalabstractevidence 2/5
  Keywords: complex mixtures concentrations organic micropollutants commonly found rivers streams relationship structure native bacterial communities underlie

Questions about this gap